Middle body discharging device of reciprocating compressor

Abstract

The utility model discloses a reciprocating compressor midbody discharge device. Comprising a gas-liquid separator, a high-pressure middle body, a low-pressure middle body and a dirty oil receiver. A condenser is arranged in the gas-liquid separator; the high-pressure middle body is connected with a first exhaust pipe and a first liquid discharge pipe, a gas-liquid separator is mounted on the first exhaust pipe, gas enters the gas-liquid separator and is condensed by a condenser, and then a gas phase and condensate are respectively discharged from the gas-liquid separator; the low-pressure middle body is connected with a second exhaust pipe and a second liquid discharge pipe, a gas-liquid separator is mounted on the second exhaust pipe, and after gas enters the gas-liquid separator and is condensed by the condenser, a gas phase and condensate are respectively discharged from the gas-liquid separator; and the dirty oil receiver is communicated with the first liquid discharge pipe and the second liquid discharge pipe in a staggered manner. According to the reciprocating compressor midbody discharging and recycling device, environmental pollution caused by condensation of high-temperature oil gas carried when the midbody discharging air is discharged into the air is reduced, and the problem of pressure mixing of a high-pressure midbody and a low-pressure midbody during liquid discharging is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of gas-liquid discharge of compressors, and in particular to a mid-body discharge device of a reciprocating compressor. Background Art

[0002] Compressors are used in all aspects of petrochemical production, and there are many types of compressors. Reciprocating compressors are composed of a fuselage, a middle body, a cylinder, and a transmission mechanism. The middle body is the connecting bridge between the fuselage and the cylinder. The main function of the middle body is to isolate the transmission part from the cylinder.

[0003] The two chambers separated by the middle body are the high-pressure middle body and the low-pressure middle body. The high-pressure middle body is close to the cylinder side, and the low-pressure middle body is close to the crankcase side. There is a filler between the high-pressure middle body and the low-pressure middle body. Both the high-pressure middle body and the low-pressure middle body are provided with a gas discharge port at the top to discharge the internal gas; and a drainage pipe is provided at the bottom to discharge the dirty oil. In the process of realizing the invention, the inventor found that the reciprocating compressor has a high temperature during operation, and the exhaust temperature of the gas after compression is 110°C. The internal temperature of the middle body is close to the exhaust temperature, and part of the lubricating oil from the stuffing box oiling and crankcase leakage is converted into high-temperature oil gas, causing the gas discharged from the gas phase discharge pipes on the top of the high-pressure middle body and the low-pressure middle body to carry high-temperature oil gas. After the high-temperature oil gas is condensed, it drips from the discharge port, which will pollute the outer wall and ground of the machine room. At the same time, the lubricating oil leaked in the middle body is not discharged in time and accumulates in the middle body. When the high-pressure gas is vented, it will also carry the lubricating oil in the middle body out and pollute the environment. In addition, when the bottom drainage pipes of the high-pressure middle body and the low-pressure middle body are connected to a common dirty oil tank, there is a problem of forming a connecting loop, resulting in cross-pressure between the high-pressure middle body and the low-pressure middle body. Utility Model Content

[0004] The purpose of the present application is to provide a reciprocating compressor mid-body discharge device to reduce the amount of lubricating oil carried by the gas phase discharge pipeline when it is discharged into the air, reduce pollution to the environment, and avoid the cross-pressure problem of the high-pressure mid-body and the low-pressure mid-body when discharging liquid.

[0005] The technical solution of the present application provides a reciprocating compressor midbody discharge device, comprising a gas-liquid separator, a high-pressure midbody, a low-pressure midbody and a dirty oil receiver; a gas inlet is provided at the bottom of the gas-liquid separator, a gas outlet is provided at the top of the gas-liquid separator, and a condenser is arranged in the gas-liquid separator; a first exhaust pipe for discharging gas and a first liquid discharge pipe for discharging dirty oil are connected to the high-pressure midbody, the gas-liquid separator is installed on the first exhaust pipe, and the gas in the first exhaust pipe enters the gas-liquid separator from the lower side of the gas-liquid separator and is discharged from the gas-liquid separator after being condensed by the condenser. The gas is discharged from the top of the gas-liquid separator, and the condensed liquid is discharged from the bottom of the gas-liquid separator to the dirty oil receiver; the low-pressure intermediate body is connected with a second exhaust pipe for discharging gas and a second drain pipe for discharging dirty oil, the gas-liquid separator is installed on the second drain pipe, the gas in the second exhaust pipe enters the gas-liquid separator from the lower side of the gas-liquid separator and is discharged from the top of the gas-liquid separator after condensation by the condenser, and the condensed liquid is discharged from the bottom of the gas-liquid separator to the dirty oil receiver; the dirty oil receiver is connected with the first drain pipe and the second drain pipe in an alternating manner.

[0006] Optionally, a first control valve is installed on the first liquid discharge pipe, and a second control valve is installed on the second liquid discharge pipe, and the first control valve and the second control valve are opened alternately.

[0007] Optionally, the condenser comprises at least three layers of baffles arranged alternately along the height direction.

[0008] Optionally, the baffle includes a mounting end and a free end that are arranged opposite to each other, the mounting end is used to be mounted on the inner wall of the gas-liquid separator, and the free end extends in a direction close to the bottom of the gas-liquid separator.

[0009] Optionally, the mounting end is welded and fixed to the inner wall of the gas-liquid separator.

[0010] Optionally, the condenser includes a condensation plate extending spirally along a height direction of the gas-liquid separator.

[0011] Optionally, the body discharge device of the reciprocating compressor also includes a third drain pipe and a fourth drain pipe respectively connected to the bottom of the two gas-liquid separators, the third drain pipe and the fourth drain pipe are both connected to the fifth drain pipe, and the fifth drain pipe is connected to the dirty oil receiver; the third drain pipe is provided with a third control valve, the fourth drain pipe is provided with a fourth control valve, and the fifth drain pipe is provided with a fifth control valve.

[0012] Optionally, the heights of the third drain pipe and the fourth drain pipe are both higher than the height of the fifth drain pipe.

[0013] Optionally, the reciprocating compressor mid-body discharge device also includes a cylinder, the high-pressure mid-body is located between the cylinder and the low-pressure mid-body, a stuffing box is arranged between the cylinder and the high-pressure mid-body, the stuffing box is connected to the dirty oil receiver through a sixth drain pipe, and a control valve is arranged on the sixth drain pipe.

[0014] Optionally, a gas-liquid separator is provided on the sixth liquid discharge pipe, and a third exhaust pipe is provided on the top of the gas-liquid separator.

[0015] The above technical solution has the following beneficial effects:

[0016] The reciprocating compressor mid-body discharge device provided in the present application has a gas-liquid separator installed on the first exhaust pipe of the high-pressure mid-body, and a gas-liquid separator installed on the second exhaust pipe of the low-pressure mid-body. The condenser in the gas-liquid separator can quickly cool down the high-temperature gas entering the gas-liquid separator so that the waste liquid in the high-temperature gas can be liquefied from the gas, reducing the amount of lubricating oil carried by the high-temperature gas when it is discharged from the gas-liquid separator, thereby reducing pollution to the environment; the waste liquid receiver is connected to the first drain pipe of the high-pressure mid-body and the second drain pipe of the low-pressure mid-body in an alternating manner, so that in the same time period, only one of the first drain pipe or the second drain pipe is in an open state, and the other is in a closed state, so that the waste liquid receiver is only connected to one of the high-pressure mid-body or the low-pressure mid-body, avoiding the problem of cross pressure of the high-pressure mid-body or the low-pressure mid-body during discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a body discharge device in a reciprocating compressor in one embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the arrangement of baffles in a gas-liquid separator connected to a high-pressure intermediate body in one embodiment of the present application.

[0019] Reference Numbers

[0020] 1-high pressure middle body, 10-first exhaust pipe, 11-first liquid discharge pipe, 110-first control valve, 12-stuffing box, 120-sixth liquid discharge pipe;

[0021] 2- low pressure middle body, 20- second exhaust pipe, 21- second liquid discharge pipe, 210- second control valve;

[0022] 3-gas-liquid separator, 30-condenser, 300-baffle, 301-installation end, 302-free end, 31-third liquid discharge pipe, 310-third control valve, 32-fourth liquid discharge pipe, 320-fourth control valve, 33-fifth liquid discharge pipe, 330-fifth control valve, 34-gas inlet, 35-gas outlet;

[0023] 4- Waste oil receiver;

[0024] 5-gas-liquid separation element, 50-third exhaust pipe;

[0025] 6-Cylinders. DETAILED DESCRIPTION

[0026] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0027] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a variety of structural modes and implementation modes can be replaced by those skilled in the art. Therefore, the following specific implementation methods and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction on the technical solution of the utility model.

[0028] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0029] The present application provides a reciprocating compressor mid-body discharge device, comprising a gas-liquid separator 3 , a high-pressure mid-body 1 and a low-pressure mid-body 2 .

[0030] Please refer to Figure 1 and Figure 2 A gas inlet 34 is provided at the lower side of the gas-liquid separator 3, a gas outlet 35 is provided at the top of the gas-liquid separator 3, and a condenser 30 is provided in the gas-liquid separator 3. The condenser 30 can quickly cool down the high-temperature gas entering the gas-liquid separator 3, so that the waste liquid in the high-temperature gas is liquefied from the gas, reducing the amount of lubricating oil carried by the high-temperature gas when it is discharged from the gas outlet 35 of the gas-liquid separator 3, thereby reducing pollution to the environment. Waste liquid includes waste oil, sewage, etc.

[0031] Please refer to Figure 1The high-pressure middle body 1 is connected with a first exhaust pipe 10 for exhausting gas and a first drain pipe 11 for exhausting waste liquid, the first exhaust pipe 10 is installed with the gas-liquid separator 3, the gas in the first exhaust pipe 10 enters the gas-liquid separator 3 from the lower side of the gas-liquid separator 3 and is discharged from the top of the gas-liquid separator 3 after being condensed by the condenser 30; the low-pressure middle body 2 is connected with a second exhaust pipe 20 for exhausting gas and a second drain pipe 21 for exhausting waste liquid, the second exhaust pipe 20 is installed with the gas-liquid separator 3, the gas in the second exhaust pipe 20 enters the gas-liquid separator 3 from the lower side of the gas-liquid separator 3 and is discharged from the top of the gas-liquid separator 3 after being condensed by the condenser 30.

[0032] In the embodiment of the present application, the first exhaust pipe 10 is installed at the top wall of the high-pressure middle body 1, and the second exhaust pipe 20 is installed at the top wall of the low-pressure middle body 2, so as to quickly discharge the gas in the high-pressure middle body 1 and the low-pressure middle body 2. The first drain pipe 11 is installed at the bottom of the high-pressure middle body 1, and the second drain pipe 21 is installed at the bottom of the low-pressure middle body 2, so as to discharge the waste liquid in the high-pressure middle body 1 and the low-pressure middle body 2.

[0033] The waste liquid receiver 4 is connected to the first drain pipe 11 and the second drain pipe 21 in an alternating manner, that is, in the same time period, only one of the first drain pipe 11 or the second drain pipe 21 is in an open state, and the other is in a closed state, so that the waste liquid receiver 4 is only connected to one of the high-pressure middle body 1 or the low-pressure middle body 2, avoiding the problem of cross pressure of the high-pressure middle body 1 or the low-pressure middle body 2 during discharge.

[0034] The reciprocating compressor midbody discharge device provided in the embodiment of the present application has a gas-liquid separator 3 installed on the first exhaust pipe 10 of the high-pressure midbody 1, and a gas-liquid separator 3 installed on the second exhaust pipe 20 of the low-pressure midbody 2. The condenser 30 in the gas-liquid separator 3 can quickly cool down the high-temperature gas entering the gas-liquid separator 3, so that the waste liquid in the high-temperature gas is liquefied from the gas, reducing the amount of lubricating oil carried by the high-temperature gas when it is discharged from the gas-liquid separator 3, and reducing pollution to the environment; the waste liquid receiver 4 is staggeredly connected with the first drain pipe 11 of the high-pressure midbody 1 and the second drain pipe 21 of the low-pressure midbody 2, so that in the same time period, only one of the first drain pipe 11 or the second drain pipe 21 is in an open state, and the other is in a closed state, so that the waste liquid receiver 4 is only connected to one of the high-pressure midbody 1 or the low-pressure midbody 2, avoiding the problem of cross pressure of the high-pressure midbody 1 or the low-pressure midbody 2 during discharge.

[0035] Optionally, a first control valve 110 is installed on the first liquid discharge pipe 11, and a second control valve 210 is installed on the second liquid discharge pipe 21, and the first control valve 110 and the second control valve 210 are opened alternately. Figure 1 As shown, by controlling the first control valve 110 and the second control valve 210 to open alternately, the high-pressure intermediate body 1 and the low-pressure intermediate body 2 are alternately connected to the waste liquid receiver 4 for sewage discharge. The first control valve 110 and the second control valve 210 in the embodiment of the present application can be either manual control valves or electric control valves.

[0036] Optionally, the condenser 30 comprises at least three layers of baffles 300 arranged in a staggered manner in the height direction. Figure 1 to Figure 2 As shown, at least three layers of baffles 300 are staggered to define a curved channel for the high-temperature gas to pass through. When the high-temperature gas passes along the baffles 300, the waste liquid carried in the high-temperature gas is condensed on the baffles 300 and collected at the bottom of the gas-liquid separator 3 before being discharged.

[0037] Optionally, the baffle 300 includes a mounting end 301 and a free end 302 that are arranged opposite to each other, the mounting end 301 is used to be mounted on the inner wall of the gas-liquid separator 3, and the free end 302 extends toward the bottom of the gas-liquid separator 3. The free end 302 of the baffle 300 guides the waste liquid, so that the waste liquid condensed on the baffle 300 is promptly guided to a position close to the bottom of the gas-liquid separator 3 and then discharged.

[0038] Optionally, the mounting end 301 is welded and fixed on the inner wall of the gas-liquid separator 3. Welding fixation is stable and reliable, and is easy to install.

[0039] Optionally, the condenser 30 includes a condensation plate extending spirally along the height direction of the gas-liquid separator 3. The embodiment of the present application provides another optional implementation of the condenser 30, and the spirally arranged condensation plate guides the high-temperature gas spirally and facilitates the waste liquid in the high-temperature gas to be precipitated on the condensation plate in time.

[0040] Optionally, the reciprocating compressor body discharge device further includes a third drain pipe 31 and a fourth drain pipe 32 respectively connected to the bottoms of the two gas-liquid separators 3, the third drain pipe 31 and the fourth drain pipe 32 are both connected to a fifth drain pipe 33, and the fifth drain pipe 33 is connected to the waste liquid receiver 4; the third drain pipe 31 is provided with a third control valve 310, the fourth drain pipe 32 is provided with a fourth control valve 320, and the fifth drain pipe 33 is provided with a fifth control valve 330. Figure 1As shown, in the embodiment of the present application, the third control valve 310 and the fourth control valve 320 control the drainage of their respective gas-liquid separators 3. The fifth control valve 330 controls the drainage to the waste oil receiver 4 to discharge the waste liquid accumulated at the bottom of the two gas-liquid separators 3 in time.

[0041] Optionally, the heights of the third drain pipe 31 and the fourth drain pipe 32 are both higher than the height of the fifth drain pipe 33. Figure 1 As shown, in the embodiment of the present application, the waste liquid in the third drain pipe 31 and the fourth drain pipe 32 can be quickly discharged into the fifth drain pipe 33 under the action of gravity and discharged uniformly from the fifth drain pipe 33 to the waste liquid receiver 4.

[0042] Optionally, the reciprocating compressor middle body discharge device further includes a cylinder 6, the high-pressure middle body 1 is located between the cylinder 6 and the low-pressure middle body 2, a stuffing box 12 is provided between the cylinder 6 and the high-pressure middle body 1, the stuffing box 12 is connected to the waste liquid receiver 4 through a sixth drain pipe 120, and a control valve is provided on the sixth drain pipe 120. In the embodiment of the present application, when the compressor is running, lubricating oil is continuously injected into the stuffing box 12 to lubricate and cool the stuffing, the sixth drain pipe 120 can discharge the lubricating oil injected into the stuffing box in time, and the control valve controls the opening and closing of the sixth drain pipe 120.

[0043] Optionally, a gas-liquid separator 5 is provided on the sixth drain pipe 120, and a third exhaust pipe 50 is provided on the top of the gas-liquid separator 5. The gas-liquid separator 5 in the embodiment of the present application separates the lubricating oil injected into the stuffing box 12 and the leaked gas and discharges them through the third exhaust pipe 50, and the lubricating oil is discharged into the waste liquid receiver 4, and is uniformly recovered by the waste liquid receiver 4.

[0044] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0045] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principles of the present invention, several other modifications can be made, which should also be considered as the protection scope of the present invention.

Claims

1. A body discharge device for a reciprocating compressor, characterized in that: It includes gas-liquid separator, high-pressure intermediate body, low-pressure intermediate body and dirty oil receiver; A gas inlet is provided at the bottom of the gas-liquid separator, a gas outlet is provided at the top of the gas-liquid separator, and a condenser is arranged inside the gas-liquid separator; The high-pressure intermediate body is connected with a first exhaust pipe for exhausting gas and a first drain pipe for exhausting dirty oil. The gas-liquid separator is installed on the first exhaust pipe. The gas in the first exhaust pipe enters the gas-liquid separator from the lower side of the gas-liquid separator and is discharged from the top of the gas-liquid separator after being condensed by the condenser. The condensed liquid is discharged from the bottom of the gas-liquid separator to the dirty oil receiver. The low-pressure intermediate body is connected with a second exhaust pipe for exhausting gas and a second drain pipe for exhausting dirty oil, the gas-liquid separator is installed on the second drain pipe, the gas in the second exhaust pipe enters the gas-liquid separator from the lower side of the gas-liquid separator and is discharged from the top of the gas-liquid separator after being condensed by the condenser, and the condensate is discharged from the bottom of the gas-liquid separator to the dirty oil receiver; The dirty oil receiver is in staggered communication with the first drain pipe and the second drain pipe.

2. The reciprocating compressor midbody discharge device according to claim 1, characterized in that: A first control valve is installed on the first liquid discharge pipe, and a second control valve is installed on the second liquid discharge pipe. The first control valve and the second control valve are opened alternately.

3. The reciprocating compressor midbody discharge device according to claim 1, characterized in that: The condenser comprises at least three layers of baffles which are staggered in the height direction.

4. The reciprocating compressor midbody discharge device according to claim 3, characterized in that: The baffle includes a mounting end and a free end that are arranged opposite to each other, the mounting end is used to be mounted on the inner wall of the gas-liquid separator, and the free end extends toward a direction close to the bottom of the gas-liquid separator.

5. The reciprocating compressor midbody discharge device according to claim 4, characterized in that: The mounting end is welded and fixed on the inner wall of the gas-liquid separator.

6. The reciprocating compressor midbody discharge device according to claim 1, characterized in that: The condenser includes a condensation plate spirally extending along a height direction of the gas-liquid separator.

7. The reciprocating compressor midbody discharge device according to any one of claims 1 to 3, characterized in that: The reciprocating compressor body discharge device further comprises a third drain pipe and a fourth drain pipe respectively connected to the bottoms of the two gas-liquid separators, the third drain pipe and the fourth drain pipe are both connected to a fifth drain pipe, and the fifth drain pipe is connected to the dirty oil receiver; The third liquid discharge pipe is provided with a third control valve, the fourth liquid discharge pipe is provided with a fourth control valve, and the fifth liquid discharge pipe is provided with a fifth control valve.

8. The reciprocating compressor midbody discharge device according to claim 7, characterized in that: The heights of the third drain pipe and the fourth drain pipe are both higher than the height of the fifth drain pipe.

9. The reciprocating compressor midbody discharge device according to claim 1, characterized in that: The reciprocating compressor mid-body discharge device also includes a cylinder, the high-pressure mid-body is located between the cylinder and the low-pressure mid-body, a stuffing box is arranged between the cylinder and the high-pressure mid-body, the stuffing box is connected to the dirty oil receiver through a sixth drain pipe, and a control valve is arranged on the sixth drain pipe.

10. The reciprocating compressor midbody discharge device according to claim 9, characterized in that: A gas-liquid separator is arranged on the sixth liquid discharge pipe, and a third exhaust pipe is arranged on the top of the gas-liquid separator.

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